Arbor press



1,503,668 B. P. SCHILTZ ARBOR PRESS Filed Oct. 21, 1920 3 Sheets-Sheet 1 FIGUREZV INVENTOR BER MARDP. SCJ-HLTZ.

Aug. 5 I924.

1,503,668 B. P. ISCHILTZ ARBOR PRESS Filed Oct. 21. 1920 5 Sheets-Sheet. 2

FIGURE 6' SECTION HZ UKZ MJV INVENTOR. BERNARD P ScmLTZ A TTORNE Y.

Patented Aug. 5, 19 24.

NITE STATS BERNARD P. SGI-IIL'IZ, OF CLEVELAND, OHIO, ASSIGNOR TO THE P. A. GEIER COM- PAN'Y, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ARBOR rnnss.

Application filed October 21, 1920. Serial No. 418,458.

To all whom it may concern:

Be it known that I, BERNARD P. SonILTz, a cltlzen of the United States of America,

residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Arbor Presses, of which the following is a specification.

My invention relates to improvements in arbor presses and has for its object the provision of mechanism enabling the user readily to vary the power exerted by the press, as by looking it so as to be directly actuated by the lever or by interposing variable gears.

My improvements are embodied in a novel, variable gearing adapted to accomplish these objects while presenting the advantages of maximum strength, durability and simplicity.

Moreover the improved structure, which I shall describe with some detail, is extremely compact, being contained in a relatively small gear casing adapted for actuation by the operating lever and closely adjacent to the plunger of the arbor press.

i Within said gear casing there are provided a stationary gear, its meshing gear, a shifting gear adapted to interlock with the latter or with the casing, and a ratchet-actuating gear meshing with said shifting gear. These members, reacting upon the usual pinion shaft, serve to actuate the plunger and rack of the arborpress in accordance with the locking arrangement of the .shifting.

gear and the ratio of the adjusted gearing. The features of my improvement and the mode of operation may best be described in connection with the accompanying draw- I 2' be sufficient for illustrating the use of my Fig. l is a fragmentary view in front 'elevation, partially sectioned illustrating the: g

' the "invention to the novel actuating means.

ings, wherein gear casing and lever.

Fig. 2 is a side view thereof with the cover' plate removed, together with the outer meshing gears.

Fig. 3 is an irregular section on lme AG,

and partly in elevation to show the relation of the gears; the section being indicatechby line HN, Fig. 4. t

Fig. 7 is a side view of the arbor press to which my improvements have been applied, an

Fig. 8 is a fragmentary perspective view of the upper portion of the press with the gear casing and lever'removed.

Throughout the several figures of the drawings I have employed the same character of reference to indicate similar parts.

Referring first to Fig. 7, the general features of the arbor press are therein shown in connection with a compact gear casing near the upper left hand portion of said figure wherein are contained my improved actuating means. I mayadvantageously itemize the several principal members of such arbor press and actuating means as follows: The gear casing is indicated by 1 and its removable cover by 2; the pinion shaft by 3; the

operating lever by 4 and its set screw by 14-;

the gear shift stud by 5; the cover screws by 6; the shifting gear by 7 and its set screw by 8; the reduction gear by 9; the adjusting screw, spring and detent-ball, respectively, by 10, 11 and 12; the stationary gear by 13; the pawl springs by 15, 16; the pawlactuating gear by 17; the contained pawls by 18, 18'; the tapered locking pin by 19 and its associated hand wheel by 20; the bored standard by 21 and its contained rack and plunger by 2 2; the actuating pinion by 23 and the-press'body by 24:.

Y Since" there are present no variations from or improvements upon a well known press body 24, the outline view thereof will improvements without further description and'I will direct my further explanation of tuated into engagement with the reduction gear 9, as there illustrated, so that it will be rotated. by the latter through a. small. arc, or said gear 7 may be locked alternar tively by engagement with the rib 2 provided on the interior of the cover, as best shown in Fig. 8'. It will be observed that the inner end ofsaidstud 5 is provided with two annular grooves, either one of which may be engaged by the ball 12 to hold the stud and gear in one or the other of their operative positions.

Meshing, in. turn, with the gear 7 is the ann ular pawl-actuating gear 17 carrying within its recesses the pawls 18, 18". Alternatively one or the other ofthese pawls will engage with the ratchet teeth of the ratchet wheel 3 provided at the outer endof the pinion shaft, by which said shaftis adapted to be rotated. step by step;. Referring to Fig. 5, it is seen that the pawls 1'8, 18-, are respectively engaged terminally by the annular springs 15, 16,- so that the tendency is constantly to engage the pawls with the ratchet teeth. The pawls are each provided with an extended end: 13", which engage the cams 1'3 alternatively and serve to: lift one or the other or both out of: suchengagement, in order to free the ratchet wheel: and. its pinion shaft,

It will be understood, of course, that the g ratios of the gears may be varied merely by substituting meshing gears ofdifferent sizes, but with the members constructed and proportioned as shown in the drawings, and adjusted as illustrated in Fig. 6' with the gears 7 and 9- interlocked through their tongue and groove construction, the operative ratio is approximately three to one. Thus a very material. increase in; leverage is provided as applied through the gearing and pinion shaft to plunger 22.

In order to afford more rapid actuation of the plunger, however, it is necessary only to withdraw the gear shift stud 5 and: its connected gear to their outermost positions, with the groove indicated by the dotted line, Fig. 3, in engagement with the rib 2,

whereupon said gear 7! will be locked to rotate with the gear casing and act as adirect drive. for the pawvl actuating gear 17, with which it invariably is in mesh, and about which it isotherwise concentrically rotated, when locked in operative engagement alternatively with the gear 9'.

r This latter operation, when the maximum power is desired, may bear a little further explanation. lhus, referring to Fig. 2, it will be recalled that the gear 13 is held stationary while the gear easing and its associated gear 9 are concentrically rotatedabout the same. This, obviously, imparts a partial counterclockwise rotation to the gear levenet is. depressed; A slow, identical counterclockwise rotation must also be imparted to the shifting gear 7 when locked in operative relation withthis reductiongear 9, and, as a. result, the pawl actuatingz gear 17 is given a partial but still slower counterclockwise rotation, whereby the pawl 18 n engagement with the ratchet wheel 3 Wlll serve similarly to rotate the pinion shaft andv depress the plunger of the arbor press. Accordingly, it will be appreciated that a ready andhighly efi'icient provision is made for instantly converting the power moment of the press from one ratio to another, de-' pending upon the work in hand and accomplished merely by the shifting of the variable gear. stud.

lVhile I have e-xplainedr my improvements as embodied in an arbor press, the actuating mechanism of my invention is capable of much wider application, as for example with lifting jacks, or screw-actuatedmechanism, and I do not intend to restrict it to the limited use and details hereinspecified. Thus, in the appended claims I wishto be understood, in defining the gear or' gearing for varying the ratio of power andaspeed,..

as intending mechanical: equivalents thereof, rather than the particular types of interrelated. and mutilated gear-wheels herein shown. v

Having now described the preferred: embodiment ofmy invention, I desire to claim, together with such departures therefrom or modifications as be made by the. exer cise of expected skill in. the art-,the followmg:

1. In actuating mechanism of the/class: described, the combination with a driving pinion associated with a plunger, of an actuating gear therefor, a; stationary gear, a reduction gear meshing with the; latter, connecting means for driving the actuating gear from the reduction gear and means whereby the power to the mechanism may be applied directly without reduction, sub stantially as set forth.

2. In actuating mechanism of' the class described, the combination. with a driving pinion. associated with apress plunger, of an actuating gear operatively connected. for rotating the pinion, a stationary gear, a reduction gear meshing with the latter,- and a, shifting gear adapted to be operatively associated with the reduction gear ande'mesh ing. with said actuating gear; allin association with means. for applying powento the mechanism as a whole, substantially as set forth.

3. In actuating mechanism of theclass: described, the combination with. a. pivoted gear casing and its operating lever, of a stationary gear withinthe casing, a meshing reduction. gear, an actuating gear, and an in terposed shifting gear normally meshing withthe. latter. and. provided with meansv for alternatively locking it with respect to the casing or for rotation by the reduction gear, substantially as set forth.

4. In combination with an arbor press and its plunger, a driving pinion for said plunger, an actuating gear operatively connected therewith, a concentrically pivoted gear casing and its operating lever, a stationary gear therein, a reduction gear, and a shifting gear in mesh with the actuating gear and adapted alternatively to be locked with respect to the casing or for actuation by and with the reduction gear, substantially as set forth.

5. The combination with a pivoted gear casing and its operating lever, of a pinion shaft, a stationary gear and an actuating gear for the pinion shaft all concentrically mounted within the casing, an eccentrically mounted reduction gear meshing with the stationary gear, and a shifting gear adapted alternatively to be locked for rotation with the latter or with respect to the gear casing, and meshing with the actuating gear, substantially as set forth.

6. In actuating mechanism of the class described, the combination with a driving pinion associated with a plunger, of an actuating gear therefor, a stationary gear, a reduction gear meshing with the latter, shiftable connecting means for driving the actuating gear from the reduction gear, and means whereby the power of the mechanism may be applied directly without reduction, substantially as set forth.

In testimony whereof I do now afiix my signature.

BERNARD P. SCHILTZ. 

